HVAC System Modification at 51 Madison Avenue, Manhattan
51 MADISON AVENUE, MANHATTAN, 10010 · Midtown South-Flatiron-Union Square
What was permitted
This mechanical systems permit application is for modifications to an existing HVAC system at 51 Madison Avenue in Manhattan's Midtown South-Flatiron-Union Square area.
The permit was issued on May 21, 2026, with a substantial project cost of $383,160. JT MAGEN & COMPANY INC is listed as the general contractor.
Significant upgrades to HVAC systems in Midtown South commercial buildings can cost upwards of $380,000, as seen at 51 Madison Avenue.
What it cost
Issued
May 21, 2026
Expires
September 30, 2026
License
General Contractor
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Filed by JT MAGEN & COMPANY INC · 109 permits across 8 neighborhoods
View the official permit record
Tracking number, work description, cost, and dates
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View the official permit record
Tracking number, work description, cost, and dates
| Tracking Number | 252554243 |
| Work Permit # | M01382766-I1-MS |
| Job Filing Number | — |
| Work Type | Mechanical Systems |
| Status | Permit Issued |
| Job Description | Modification to existing HVAC system as per plans filed herewith. No change in use, egress or occupancy under this application. |
| Floor / Unit | Floor Number(s) 1 through 1, Sub-cellar #1 |
| Estimated Cost | $383,160 |
| Approved | May 21, 2026 |
| Issued | May 21, 2026 |
| Expires | September 30, 2026 |
| BBL | — |
| BIN | — |
Property Owner
PR
robert sweeney